Greg,
Should have read 561, not 615 - sorry. I mounted the 561 above the 898 transducer side plane, so it doen't block the side immaging. The problem I'm having is my 898 depth readouts now jump all over. The depth is correct on the screen, but the readouts go all over the place. Just thought there could be some frequency issues that are making it do this. I have the built in transducer on my terrova, I can connect the 561 without any problem. Would that be better by keeping the transducers further apart (18 foot boat) and solve frequencies problems?
thanks, Fuzz